1-Pentyne

1-Pentyne[1]
Names
	IUPAC name Pent-1-yne
	Other names Propylacetylene
Identifiers
CAS Number	627-19-0 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL16262 ;
ChemSpider	11806 ;
ECHA InfoCard	100.009.989
PubChem CID	12309;
CompTox Dashboard (EPA)	DTXSID7060835 ;
	InChI InChI=1S/C5H8/c1-3-5-4-2/h1H,4-5H2,2H3 Key: IBXNCJKFFQIKKY-UHFFFAOYSA-N ; InChI=1/C5H8/c1-3-5-4-2/h1H,4-5H2,2H3 Key: IBXNCJKFFQIKKY-UHFFFAOYAX;
	SMILES C#CCCC;
Properties
Chemical formula	C5H8
Molar mass	68.12
Appearance	Clear, colorless liquid
Density	0.691 g/mL
Melting point	−106 to −105 °C
Boiling point	40.2 °C (104.4 °F; 313.3 K)
Solubility in water	Insoluble
Hazards
Main hazards	Flammable Liquid
Flash point	−20 °C (−4 °F; 253 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

1-Pentyne, an organic compound, is a terminal alkyne. It is an isomer of 2-pentyne, an internal alkyne.

2-Pentyne

References

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Alkynes
Ethyne ( C ₂H ₂ ) Propyne ( C ₃H ₄ ) Butyne ( C ₄H ₆ ) 1 2 Pentyne ( C ₅H ₈ ) 1 2 Hexyne ( C ₆H ₁₀ ) Heptyne ( C ₇H ₁₂ ) Octyne ( C ₈H ₁₄ ) 2 4 Nonyne ( C ₉H ₁₆ ) Decyne ( C ₁₀H ₁₈ ) 1 5
Preparations	Cracking Dehydrogenation of alkane, alkene Alkylation of alkynyl anion Dehydrohalogenation of dihaloalkane Fritsch–Buttenberg–Wiechell rearrangement Corey–Fuchs reaction Seyferth–Gilbert homologation
Reactions	Deprotonation Hydrogenation Halogenation Hydration Hydroboration Hydrohalogenation Thiol-yne reaction Alkyne trimerisation Diels–Alder reaction Pauson–Khand reaction Azide-alkyne Huisgen cycloaddition Sonogashira coupling Cadiot–Chodkiewicz coupling Glaser coupling Favorskii reaction